Door lock set



Aug. 16, 1960 F. KAISER 2,949,328

DOOR LOCK SET Filed Nov. 7, 1957 2 Sheets-Sheei l Aug. 16, 1960 FiledNov. 7, 1957 F. KAISER 2,949,328 Doon Loox SET 2 Shees-SheeiI 2 UnitedStates Patent C DOOR LOCK SET Fred Kaiser, New York, N.Y. (198 07 DuntonAve., Hollis, N.Y.)

Filed Nov. 7, 1957, ser. 10,694,976

-4 claims. (01.292-207) This invention relates generally to doorhardware and more particularly to door lock set construction particular-1y suited to light weight doors, such as screen doors, and the like.

It is among the objects of the present invention to provide a door lockset in which only very small holes are required in the door, just largeenough to allow passage of the knob spindle and plate bushings. Thispermits installation on narrow stile doors while preserving a maximum ofrigidity.

Another object lies in the provision of structure of the class describedin which the handle element has a relatively stationary latch boltelement which coacts with a movable strike member.

Another object is the provision of a movable strike element whichprovides a positive one way latching.

Another object lies in the provision of a push button lock which iseasily manually operable into either its locked or unlocked position bythe use of one hand.

A further object of the invention is to provide a push button lock withan automatic release operated by the mounted strike element to prevent'accidentally locking out the user, since devices of the present classare not ordinarily provided with this feature. i y

A feature of the present device is that when the door Iis closing, onceit has passed an over center position of the stationary latch bolt andthe movable strike member, the door is unable to rebound to an openposition and the blowing of the wind or other pressure will cause thedoor to become latched more securely.

These objects and other incidental ends and advantages will more fullyappear in the progress of this disclosure and be pointed out -in theappended claims.

In the drawings, in which similar reference characters designatecorresponding parts throughout the several views:

Figure 1 is a view in perspective of a preferred embodiment of theinvention.

Figure 2 is a horizontal sectional view, as seen from the plane 2 2 ofFigure 1 with the strike element in a position it occupies when the dooris latched.

'Figure 3 is a fragmentary sectional view corresponding generally toFigure 2 but showing the lock release as it is about to be shifted froma locked to an unlocked position.

Figure 4 is a fragmentary plan view, partly in section, corresponding toFigure 3 but showing the lock release in its unlocked position, and thestationary latch bolt is in its at-center position.

Figure 5 is an exploded perspective view of the inside handle unit andthe outside knob unit.

'Figure 6 is an exploded perspective view of the strike element.

Figure 7 is a sectional view, mostly in elevation, from the plane 7 7 onFigure 2.

Figure 8 is a fragmentary elevational view from the plane 8 8 on Figure5.

Figure 9 is an elevational view from plane 9 9 on Fig. 3. r

In accordance with the invention the lockset, generally indicated byVreference character 10 is preferably arranged in three separate units12, 14 and 16. This alords ease of handling and mounting on the door 18and frame 20.

The outside knob unit 12 is described thus for purposes of clarity sinceunder some conditions it may be desirable to have this unit inside ofthe building. The knob 22 may have any desired external shape. v

The outer4 body element 24 on the inner wall 25 is provided withinternally threaded bosses 26 which are engaged by the screws 27,thereby holding units 12 and 1-4 together and on the door 18. The innerwall 25 has recess 28, with knob ring detents 29 and 30, knob springanchor 31 and spring positioning lug 32. The body element 24 in therecess 28 has a spring receiving annular groove 33. Body element 24 issymmetrical vabout its horizontal axis to aid in manufacture so that ifinverted, the lug 32 may act as a spring anchor and the anchor 31 mayact as a spring positioning lug.

The knob spring 34 is disposed in the groove 33 nwardly of the lug 32and the detents 29 and 30, while its ends 35 and 36 lie to the left andright respectively ofthe anchor 31 (Figure 7) under light tension. InFigure 5 where the spring 34 is relaxed the ends are not crossed. v

The knob ring 37 has a pair of opposed keys 38 and 39 which slidablyengage the keyways 40 and 441 in the knob shank 42. Ring 37 has a dog 43which is disposed between the ends 35 and 36 of the spring 34. The partsin the knob unit 12 are held together as an assembly by a split springwasher 44 which seats in the annular groove 45 in the shaft 42. lf apermanent assembly is desired the shank 442 may be swaged and upset atthis area against the exposed surface of the ring 37.

The knob shank 42 is provided with a non-circular bore 46 which slidablyreceives the correspondingly shaped main spindle Sil.

-T he inside handle unit 14 is also so referred to herein, for claritysince it may be located outside the building, depending upon thedirection against which locking is desired. The handle element 52 mayhave any desired external shape and is provided with stationary latchbolt 49, preferably integral therewith; spindle receiving hole 74,stepped lock bolt bore 47, and button way 48.

The handle element is provided with a slot 56 which extends from thelock bolt bore 47 outward, land may extend into the latch bolt 49 (seeFigures 2, 3, and 5i) and within which a lock release lever 57 ispivotally mounted on the pintle 53. The lever 57 is of-irregular shape,including a strike engaging edge 58, fulcrumhole 59, and lock boltengaging arm 60. Surrounding the arm 60 is the lever spring 61 whichnormally urges the lever toward lock releasing position. The inner endof the spring 61 seats in a pocket in the lock bolt 62. Spring 61however, also urges the lock bolt 62 against the wall o-f the bore 47.The friction of the lock bolt 62 in the bore is sniicient Ito retainsaid bolt in Aany displaced position thereof even against the action ofthe spring 61 but when the strike engaging edge 58 meets the movablestrike member 64, or the casing leading wall portion 89, said spring 61assists the movement of the lever 57 and hence the movement of the lockbolt 62 to the released or open position thereof. The lever 57 has anextension member 66 which performs several functions. The inner edge 67abuts against `the lock bolt 62 in the groove 63, when the lock bolt 62is moved to its locked position acting as an auxiliary stop. The tip63by engaging the -inner surface 69; the lock borlt button'70 can shiftthe rand water from entering the inside ,ofthe handle element;`

The inner end 72 of the lock bolt 62 is adapted to enter the socket 73in the inner body element 54, while the inner face 75 of the handleelement 52 is provided with a projection 76 which swings in the arcuatechannel 77, the `ends 78-and 79 of which limit rotational movement Ofthe handle member preferably to 45 degrees above and below horizontal sothat partial rotation of the knob or handle will permit the latch bolt49 to clear the strike member `64 when it is desired to open Vthe door18. The handle 52 maybe retained in assembled condition with respect tothe inner body element 54 so that the shank 80 is journaled in thebearing 81, by the bushing 82 which is held in place on the roundportion 83 against the shoulder 84 of the square shaft of the mainspindle 50. The round portion 83 which is the inner end of the mainspindle 50 is secured in the portion 85 in any suitable manner such as aforce lit, and/ or heading over its end at 51. This can be reachedthrough the hole 74 before the lever 57 is pu-t into place.

The strike unit 16 may comprise a casing or outer strike body 17, astrike base plate 19, strike member 64, axle 87 and strike spring 88.The outer strike body is of irregular conliguration including a leadingwall portion 89, opposing wall portion 9d, top wall 91, bottom wall 92,inner surface 93, opening 94 and rim 100 for the movable strike member.The body 17 is provided with journals 95, for the ends of the axle 87which when assembled penetrates the ears 96 on the strike member 64. Thespring 88 encircles the axle S7 between the ears 96 and one end pushesagainst the inner surface of the base plate 19 while the other endpushes against the inner surface 98 of the strike member. Spring 8S thusserves to urge the strike member to its normal outermost projectingposition in which the outer surfaces 09 of the ears 96 abut against theinner surface of the rim 100. The inner surface of the strike member 64is provided with a rib 101 which when the strike member is in its fullydepressed or retracted position enters into the orifice 102. The strikeunit is held assembled by the base plate 19 being secured against thesurface 93 in a suitable manner as by the screws 103 which pass throughholes 104 and engage the threaded holes 104e. The plate 19 forms aclosure to complete the journals 95 and the holes 105 line up so thatscrews 106 may be used to secure the strike unit in position on theframe 20.

In use when the door 18 is closed in the direction of the arrows A, thestationary latch bolt 49 cams against the strike member 64 which, as afollower swings in the direction of the arrow B (Figure 4). As soon lasthe highest point of the bolt 49 has passed, the spring S8 pushes thestrike member 64 to the position shown in Figure 2. Since any exposedportion of the strike member is beyond dead center, any movement of thedoor toward opening will force the latch bolt tighter against the strikemember and make the resistance to opening of the door greater. Thisfeature yallows a substantial tolerance in the spacing between theposition of the latch bolt and the strike member while maintainingsatisfactory operation.

When it is desired to lock the door mere linger pressure on Ithe button70 pushes the lock bolt 62 into the socket 73. This may very easily bedone with the thumb while the iingers grasp the handle 52. To manuallyrelease the lock, the upper and lower edge portions 103 of the button 70are conveniently squeezed between thumb and forefinger and pulled so asto withdraw the bolt 62 from the socket 73. If the button 70 should bepushed inadvertently While the door is open, the door will notaccidentally become locked when closed because when the lever 57 reachesthe casing vat 89 or strike member 64, which offers greater resistanceto movement than the lever 57, said strike member or casing pushes thelever 57 so as to unlock the bolt 62. This automatic feature preventsaccidental lockout of the user.

Thus, since the normal opening of the door requires that the handle 52.be turned so that the relatively stationary latch bolt 49 may be movedabove or below the movable strike -member 64 (the handle S2 beinglimited in such movement by the projection 76 in the channel 77); andthe closing of the doordoes not require a movement of the handle 52;inadvertent pressure'on the button 70 would allow the door to slam shutin a locked condition. The action of the lever prevents this. Figures 3and 4 illustrate this action.

l wish it to be understood that I do lnot desire to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art to which thepresent invention pertains.

I claim:

1. In a door lock set construction including a body which is attachableto a door, a handle element rotatably mounted on said body, a shaftrotated by said handle and a strike unit mounted on a door frame,improved lock bolt means comprising: an elongated lock bolt memberarranged for substantially axial movement parallel to the axis of ksaidshaft and rotation with said shaft, said body having a socket into whicha port-ion of said lock bolt member is selectively engageable forlocking said shaft against rotation, said handle element having arelatively stationary latch bolt thereon, of hollow con- Afiguration; apivotally mounted lever member disposed within said latch bolt andhaving a iirst portion thereof projectable into the path of said strikeunit, and a second portion pivotally engaged with said lock bolt member,whereby contact of the lever with said strike unit and relative movementtherebetween causes shifting of the lock bolt member to the unlockedposition thereof.

2. In a door lock set construct-ion including a body which is attachableto a door, a handle element rotatably mounted on said body, a shaftrotated by said handle and a strike unit mounted on a door frame,improved lock bolt means comprising: an elongated lock bolt memberarranged for substantially axial movement parallel to the axis of saidshaft and rotation with said shaft, said body having a socket into whicha portion of said lock bolt member is selectively engageable for lockingsaid shaft against rotation, means disposed on an opposite end of saidlock bolt member for manual manipulation of said lock bolt member, saidhandle element having a relatively stationary latch bolt thereon, ofhollow configuration; a pivotally mounted lever member disposed withinsaid latch bolt and having a rst portion thereof projectable into thepath of said strike unit, and a second portion pivotally engaged withsaid lock bolt member, whereby Contact of the lever with said strikeunit and relative movement therebetween causes shifting of the lock boltmember to the unlocked position thereof.

3. In a door lock set construction including a body which is attachableto a door, a handle element rotatably mounted on said body, a shaftrotated by said handle and a strike unit mounted on a door frame,improved lock bolt means comprising: an elongated lock bolt memberarranged for substantially axial movement parallel to the axis of saidshaft and rotation with said shaft, said body having a socket into whicha portion of said lock bolt member is selectively engageable for lockingsaid shaft against rotation, said handle element having a relativelystationary latch bolt thereon, of hollow coniguration; a pivotallymounted lever member disposed within said latch bolt and having a rstportion thereof projectable into the path of said strike unit, and asecond portion pivotally engaged with said lock bolt member, .wherebyContact of the lever with said strike unit and relative movementtherebetween causes shifting of the lock bolt member to the unlockedposition thereof; said last-mentioned first portion being disposedwithin said latch bolt when said lock bolt member is in unlockedposition.

4.111 a door lock set construction including :a body which is attachableto a door, a handle element rotatably mounted on said body, a shaftrotated by sa'id handle and a strike unit mounted on a door frame,improved lock bolt means comprising: an elongated lock bolt memberarranged for substantially axial movement parallel to the axis of saidshaft and rotation with said shaft, said body haw'ng a socket into whicha portion of said lock bolt member is selectively engageable for lockingsaid shaft against rotation, means disposed on an opposite end of saidlock bolt member for manual manipulation of said lock bolt member, saidhandle element having a relatively stationary latch bolt thereon, ofhollow configuration; a pivotally mounted lever member disposed withinsaid latch bolt and having a first portion thereof projectable into thepath of said strike unit, and a second portion pivotally engaged withsaid lock bolt member, whereby contact of the lever with said strikeunit and 6 relative movement therebetween causes shifting of the lockbolt member to the unlocked position thereof; said last-mentioned rstportion being disposed within said latch bolt when said lock bolt memberis in unlocked position.

References Cited in the le of this patent UNITED STATES PATENTS1,923,688 Rightmyer Aug. 22, 1933 2,166,735 Sward July 18, 19392,719,049 Fish Sept. 27, 1955 2,733,089 Grevengoed Jan. 31, 19562,784,023 Pisani Mar. 5, 1957 2,801,869 George Aug. 6, 1957 2,837,364Loeb June 3, 1958

